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O TETRATECH ` <br />~~ -' 7 t1 %rJl <br />Dfvisc: ~ <br />Apri19, 2007 (o~ininn an.; 3eG~y~n, <br />Mr. Jim Dupler <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: Morrison Quarry, Jefferson County, Colorado; Authorization to Represent <br />Aggregate Industries -WCR, Inc., MLRB Permit M 1973-021; <br />Tetra Tech RMC Job No.19-3919.038.06 <br />Dear Mr. Dupler: <br />This letter is to confirm that Tetra Tech RMC, Inc, represents Aggregate Industries - <br />WCR, Inc. regarding the Annual Report and Geotechnical Addendum for MLRB Permit <br />M 1973-02I. <br />Please call if you have any questions. <br />Sincerely, <br />TETRA TECH RMC, INC. <br />~~_-- <br />Ga L nden, R.G. <br />Project Manager <br />Ap roved by <br />ike Refer, Vic iden Aggregate Industries -WCR, Inc. <br />cc: Miko Refer, Vice President, Aggregate Industries -WCR, Inc. <br />Carl Mount, Colorado Division of Reclamation, Mining, and Safety <br />1900 S,Sunset Slreet,SuNe S-F LongmonLCO 80501 <br />Tel: 303.772.5282 Faz; 303.772.7039 <br />www.tetretuch.com <br />